A tranquil spiral galaxy, home to supernovae.
A tranquil spiral galaxy, home to supernovae. And a beautiful image too!
A tranquil spiral galaxy, home to supernovae. And a beautiful image too!
Tag: astronomy
A tranquil spiral galaxy, home to supernovae.
One of Kepler’s reaction wheels — used to orient the space telescope — has failed.
Bad news: One of Kepler’s four reaction wheels — used to orient the space telescope — has failed.
Kepler only needs three wheels to function – one to control the probe’s motion along each axis – and the probe resumed its observations on 20 July. “Kepler is functioning very well on three reaction wheels,” says mission manager Roger Hunter of NASA’s Ames Research Center in Moffett Field, California. If the glitch can’t be fixed, though, Kepler will be left without a backup wheel. “This is reducing the odds of making the mission go as long as we can,” says Kepler chief scientist William Borucki of NASA Ames, who doubts that Kepler could point accurately enough to look for transiting planets if reduced to two reaction wheels. “It was a disappointing surprise to find this wheel stopped so early.”
Bad news: One of Kepler’s four reaction wheels — used to orient the space telescope — has failed.
Kepler only needs three wheels to function – one to control the probe’s motion along each axis – and the probe resumed its observations on 20 July. “Kepler is functioning very well on three reaction wheels,” says mission manager Roger Hunter of NASA’s Ames Research Center in Moffett Field, California. If the glitch can’t be fixed, though, Kepler will be left without a backup wheel. “This is reducing the odds of making the mission go as long as we can,” says Kepler chief scientist William Borucki of NASA Ames, who doubts that Kepler could point accurately enough to look for transiting planets if reduced to two reaction wheels. “It was a disappointing surprise to find this wheel stopped so early.”
Watching a big asteroid zip past the earth, live
Watching a big asteroid zip past the earth, live.
Watching a big asteroid zip past the earth, live.
Some spectacular images of galaxies from the new Discovery Channel Telescope.
Some spectacular images of galaxies from the new Discovery Channel Telescope (DCT).
Funded privately by the Discovery channel, the DCT has a primary mirror 4.3 meters wide, or about 170 inches, almost as large as the Hale Telescope on Palomar Mountain. This is a world class telescope which will do real research, and it was built the old-fashioned way, with private money donated to a private observatory in exchange for publicity and good will.
Some spectacular images of galaxies from the new Discovery Channel Telescope (DCT).
Funded privately by the Discovery channel, the DCT has a primary mirror 4.3 meters wide, or about 170 inches, almost as large as the Hale Telescope on Palomar Mountain. This is a world class telescope which will do real research, and it was built the old-fashioned way, with private money donated to a private observatory in exchange for publicity and good will.
Using the Hubble Space Telescope astronomers have found the most distant spiral galaxy ever seen.
Using the Hubble Space Telescope astronomers have found the most distant spiral galaxy ever seen.
Using the Hubble Space Telescope astronomers have found the most distant spiral galaxy ever seen.
Scientists have failed to detect one of the leading theoretical candidates for dark matter.
Null result: Scientists have failed to detect one of the leading theoretical candidates for dark matter.
Null result: Scientists have failed to detect one of the leading theoretical candidates for dark matter.
Astronomers have discovered the first exoplanet smaller than Earth.
Astronomers have discovered the first exoplanet smaller than Earth.
The University of Central Florida has detected what could be its first planet, only two-thirds the size of Earth and located right around the corner, cosmically speaking, at a mere 33-light years away. The exoplanet candidate called UCF 1.01, is close to its star, so close it goes around the star in 1.4 days. The planet’s surface likely reaches temperatures of more than 1,000 degrees Fahrenheit. The discoverers believe that it has no atmosphere, is only two-thirds the gravity of Earth and that its surface may be volcanic or molten.
What is especially remarkable about this discovery is that the scientists used the Spitzer Space Telescope to do it, detecting the planet’s transits across the star’s face, just like Kepler. Spitzer was not designed to be able to do this.
Astronomers have discovered the first exoplanet smaller than Earth.
The University of Central Florida has detected what could be its first planet, only two-thirds the size of Earth and located right around the corner, cosmically speaking, at a mere 33-light years away. The exoplanet candidate called UCF 1.01, is close to its star, so close it goes around the star in 1.4 days. The planet’s surface likely reaches temperatures of more than 1,000 degrees Fahrenheit. The discoverers believe that it has no atmosphere, is only two-thirds the gravity of Earth and that its surface may be volcanic or molten.
What is especially remarkable about this discovery is that the scientists used the Spitzer Space Telescope to do it, detecting the planet’s transits across the star’s face, just like Kepler. Spitzer was not designed to be able to do this.
Hubble has discovered a fifth moon orbiting Pluto.
Using the Hubble Space Telescope astronomers have discovered a fifth moon orbiting Pluto.
Five moons, eh? That’s pretty good for something that isn’t supposed to be a planet.
Using the Hubble Space Telescope astronomers have discovered a fifth moon orbiting Pluto.
Five moons, eh? That’s pretty good for something that isn’t supposed to be a planet.
A hotel for stargazers
Astronomers have found four different binary star systems with the stars orbiting so close to each other that they complete their orbits in less than four hours, orbits that astronomers had previously believed “impossible.”
The uncertainty of science: Astronomers have found four different binary star systems with the stars orbiting so close to each other that they complete their orbits in less than four hours, orbits that astronomers had previously believed “impossible.”
The uncertainty of science: Astronomers have found four different binary star systems with the stars orbiting so close to each other that they complete their orbits in less than four hours, orbits that astronomers had previously believed “impossible.”
Inexplicably, a dust disk detected around a star about 460 light years away has vanished in the last two years.
The uncertainty of science: Inexplicably, a dust disk detected around a star about 460 light years away has vanished in just two years.
The uncertainty of science: Inexplicably, a dust disk detected around a star about 460 light years away has vanished in just two years.
Astronomers think they have found the fastest moving pulsar yet found, flying through space at between 5 to 6 million miles per hour.
Running away: Astronomers think they have found the fastest moving pulsar yet found, flying through space at between 5 to 6 million miles per hour.
Running away: Astronomers think they have found the fastest moving pulsar yet found, flying through space at between 5 to 6 million miles per hour.
The new X-ray telescope NuSTAR has opened its eye and taken its first images.
The new X-ray telescope NuSTAR has opened its eye and taken its first images.
The new X-ray telescope NuSTAR has opened its eye and taken its first images.
Scientists have found a previously unknown mineral embedded in a meteorite that crashed to Earth in 1969.
Scientists have found a previously unknown mineral embedded in a meteorite that crashed to Earth in 1969.
Dubbed panguite, the new titanium oxide is named after Pan Gu, the giant from ancient Chinese mythology who established the world by separating yin from yang to create the earth and the sky. … “Panguite is an especially exciting discovery since it is not only a new mineral, but also a material previously unknown to science,” says Chi Ma, a senior scientist and director of the Geological and Planetary Sciences division’s Analytical Facility at Caltech and corresponding author on the paper.
Scientists have found a previously unknown mineral embedded in a meteorite that crashed to Earth in 1969.
Dubbed panguite, the new titanium oxide is named after Pan Gu, the giant from ancient Chinese mythology who established the world by separating yin from yang to create the earth and the sky. … “Panguite is an especially exciting discovery since it is not only a new mineral, but also a material previously unknown to science,” says Chi Ma, a senior scientist and director of the Geological and Planetary Sciences division’s Analytical Facility at Caltech and corresponding author on the paper.
Astronomers watch as the supermassive black hole in the center of the Milky Way begins to eat a giant gas cloud.
Astronomers watch as the supermassive black hole in the center of the Milky Way begins to eat a giant gas cloud.
The real fireworks will occur next year, when the cloud passes only 25 billion miles from the black hole.
Astronomers watch as the supermassive black hole in the center of the Milky Way begins to eat a giant gas cloud.
The real fireworks will occur next year, when the cloud passes only 25 billion miles from the black hole.
Two exoplanets in a tight orbital dance.
Two exoplanets in a tight orbital dance.
“These are the closest two planets to one another that have ever been found,” Agol said. “The bigger planet is pushing the smaller planet around more, so the smaller planet was harder to find.”
Orbiting a star in the Cygnus constellation referred to as Kepler-36a, the planets are designated Kepler-36b and Kepler-36c. Planet b is a rocky planet like Earth, though 4.5 times more massive and with a radius 1.5 times greater. Kepler-36c, which could be either gaseous like Jupiter or watery, is 8.1 times more massive than Earth and has a radius 3.7 times greater.
But wait, there’s more!
The fact that the two planets are so close to each other and exhibit specific orbital patterns allowed the scientists to make fairly precise estimates of each planet’s characteristics, based on their gravitational effects on each other and the resulting variations in the orbits. To date, this is the best-characterized system with small planets, the researchers said.
They believe the smaller planet is 30 percent iron, less than 1 percent atmospheric hydrogen and helium and probably no more than 15 percent water. The larger planet, on the other hand, likely has a rocky core surrounded by a substantial amount of atmospheric hydrogen and helium.
Two exoplanets in a tight orbital dance.
“These are the closest two planets to one another that have ever been found,” Agol said. “The bigger planet is pushing the smaller planet around more, so the smaller planet was harder to find.”
Orbiting a star in the Cygnus constellation referred to as Kepler-36a, the planets are designated Kepler-36b and Kepler-36c. Planet b is a rocky planet like Earth, though 4.5 times more massive and with a radius 1.5 times greater. Kepler-36c, which could be either gaseous like Jupiter or watery, is 8.1 times more massive than Earth and has a radius 3.7 times greater.
But wait, there’s more!
The fact that the two planets are so close to each other and exhibit specific orbital patterns allowed the scientists to make fairly precise estimates of each planet’s characteristics, based on their gravitational effects on each other and the resulting variations in the orbits. To date, this is the best-characterized system with small planets, the researchers said.
They believe the smaller planet is 30 percent iron, less than 1 percent atmospheric hydrogen and helium and probably no more than 15 percent water. The larger planet, on the other hand, likely has a rocky core surrounded by a substantial amount of atmospheric hydrogen and helium.
Astronomers have videotaped the fly-by of a 23-foot-wide asteroid as it zipped past the Earth on May 29 at a distance of only about 12,000 miles.
Astronomers have videotaped the fly-by of a 23-foot-wide asteroid as it zipped past the Earth on May 29 at a distance of only about 12,000 miles. The video is below the fold.
» Read more
Astronomers have videotaped the fly-by of a 23-foot-wide asteroid as it zipped past the Earth on May 29 at a distance of only about 12,000 miles. The video is below the fold.
» Read more
Scientists have concluded that a 460 foot diameter asteroid only has a 1 percent chance of hitting the Earth in 2040.
O goody: Scientists have concluded that a 460 foot diameter asteroid only has a 1 percent chance of hitting the Earth in 2040.
Observations to date indicate there is a slight chance that AG5 could impact Earth in 2040. Attendees expressed confidence that in the next four years, analysis of space and ground-based observations will show the likelihood of 2011 AG5 missing Earth to be greater than 99 percent.
It appears that they won’t really be able to pin down the impact odds for 2040 until 2023, when the asteroid passes the Earth at a distance of 1.1 million miles.
O goody: Scientists have concluded that a 460 foot diameter asteroid only has a 1 percent chance of hitting the Earth in 2040.
Observations to date indicate there is a slight chance that AG5 could impact Earth in 2040. Attendees expressed confidence that in the next four years, analysis of space and ground-based observations will show the likelihood of 2011 AG5 missing Earth to be greater than 99 percent.
It appears that they won’t really be able to pin down the impact odds for 2040 until 2023, when the asteroid passes the Earth at a distance of 1.1 million miles.
Has Voyager 1 finally left the solar system?
Watch an asteroid a third of a mile across zip past the Earth tonight.
Watch an asteroid a third of a mile across zip past the Earth tonight.
Watch an asteroid a third of a mile across zip past the Earth tonight.
NASA has released more information about the two space telescopes the National Reconnaissance Office has donated to them.
NASA has released more information about the two space telescopes the National Reconnaissance Office has donated to them.
NASA has released more information about the two space telescopes the National Reconnaissance Office has donated to them.
Unless they can find a buyer the United Kingdom will close down its 3.8 meter infrared UKIRT telescope on Mauna Kea in 2013.
Telescope for sale: Unless they can find a buyer the United Kingdom will close down its 3.8 meter infrared UKIRT telescope on Mauna Kea in 2013.
This is a tragedy. A 3.8 meter telescope is no slouch and can do amazing research. The problem is that all the available money in ground-based astronomy is now being eaten up by the construction of giant telescopes in the 20 to 40 meter range.
What astronomy needs are some wealthy philanthropists who would like to buy these mid-sized telescopes, put their names on it, and finance their operation. This is how most big telescopes were made possible before World War II.
Telescope for sale: Unless they can find a buyer the United Kingdom will close down its 3.8 meter infrared UKIRT telescope on Mauna Kea in 2013.
This is a tragedy. A 3.8 meter telescope is no slouch and can do amazing research. The problem is that all the available money in ground-based astronomy is now being eaten up by the construction of giant telescopes in the 20 to 40 meter range.
What astronomy needs are some wealthy philanthropists who would like to buy these mid-sized telescopes, put their names on it, and finance their operation. This is how most big telescopes were made possible before World War II.
Orbital Sciences successfully launched NASA’s NuSTAR X-ray telescope this morning.
After a three month delay so that NASA could correct software issues, Orbital Sciences successfully launched NASA’s NuSTAR X-ray telescope this morning.
After a three month delay so that NASA could correct software issues, Orbital Sciences successfully launched NASA’s NuSTAR X-ray telescope this morning.
Construction of the world’s largest ground-based telescope has been approved by the European Southern Observatory.
Construction of the world’s largest ground-based telescope has been approved by the European Southern Observatory.
No one should get too excited about this announcement. They still need to raise 90% of their funds to build it, and to do so they have to get agreements from the four member countries of the European Southern Observatory. It will be years, probably at least a decade, before this 40-meter truly gigantic telescope sees the light.
Construction of the world’s largest ground-based telescope has been approved by the European Southern Observatory.
No one should get too excited about this announcement. They still need to raise 90% of their funds to build it, and to do so they have to get agreements from the four member countries of the European Southern Observatory. It will be years, probably at least a decade, before this 40-meter truly gigantic telescope sees the light.
Solar Dynamic Observatory successfully imaged Venus’s atmosphere during yesterday’s transit
Solar Dynamic Observatory successfully imaged Venus’s atmosphere during yesterday’s transit. Cool images too.
Solar Dynamic Observatory successfully imaged Venus’s atmosphere during yesterday’s transit. Cool images too.
Watch the Venus transit live
Watch the Venus transit live:
From space, from Solar Dynamics Observatory.
From Universe Today, on Youtube.
Watch the Venus transit live:
From space, from Solar Dynamics Observatory.
From Universe Today, on Youtube.
Due to cost overruns, NASA has cancelled the GEM X-ray telescope.
Due to cost overruns, NASA has cancelled the GEM X-ray telescope.
Due to cost overruns, NASA has cancelled the GEM X-ray telescope.
Astronomers think they have discovered a distant supermassive black hole that is being ejected from its galaxy at a speed of several million miles per hour.
Astronomers think they have discovered a distant supermassive black hole that is being ejected from its galaxy at a speed of several million miles per hour.
Although the ejection of a supermassive black hole from a galaxy by recoil because more gravitational waves are being emitted in one direction than another is likely to be rare, it nevertheless could mean that there are many giant black holes roaming undetected out in the vast spaces between galaxies. “These black holes would be invisible to us,” said co-author Laura Blecha, also of CfA, “because they have consumed all of the gas surrounding them after being thrown out of their home galaxy.”
This conclusion however is not final. The data could also be explained by the spiraling in of two supermassive black holes.
Astronomers think they have discovered a distant supermassive black hole that is being ejected from its galaxy at a speed of several million miles per hour.
Although the ejection of a supermassive black hole from a galaxy by recoil because more gravitational waves are being emitted in one direction than another is likely to be rare, it nevertheless could mean that there are many giant black holes roaming undetected out in the vast spaces between galaxies. “These black holes would be invisible to us,” said co-author Laura Blecha, also of CfA, “because they have consumed all of the gas surrounding them after being thrown out of their home galaxy.”
This conclusion however is not final. The data could also be explained by the spiraling in of two supermassive black holes.
The military has given NASA two Cold War era spy space telescopes with mirrors comparable to Hubble’s.
Big news: The military has given NASA two Cold War era spy space telescopes with mirrors comparable to Hubble’s.
They have 2.4-meter (7.9 feet) mirrors, just like the Hubble. They also have an additional feature that the civilian space telescopes lack: A maneuverable secondary mirror that makes it possible to obtain more focused images. These telescopes will have 100 times the field of view of the Hubble, according to David Spergel, a Princeton astrophysicist and co-chair of the National Academies advisory panel on astronomy and astrophysics.
Since astronomers have over the past dozen years been remarkably uninterested in launching a replacement for Hubble, they now find themselves in a situation where they might have no optical capabilities at all in space. Hubble is slowing dying from age, and NASA doesn’t have the money to build a new optical space telescope, especially since with any new space telescope proposal the astronomical community has had the annoying habit of demanding more sophistication than NASA can afford.
This announcement however might just save astronomy from becoming blind. Because these spy telescopes are already half built, it will be difficult to add too many bells and whistles. Hire a launch rocket, build the cameras and spectrographs based on the instruments already on Hubble, and get the things in orbit quickly.
Big news: The military has given NASA two Cold War era spy space telescopes with mirrors comparable to Hubble’s.
They have 2.4-meter (7.9 feet) mirrors, just like the Hubble. They also have an additional feature that the civilian space telescopes lack: A maneuverable secondary mirror that makes it possible to obtain more focused images. These telescopes will have 100 times the field of view of the Hubble, according to David Spergel, a Princeton astrophysicist and co-chair of the National Academies advisory panel on astronomy and astrophysics.
Since astronomers have over the past dozen years been remarkably uninterested in launching a replacement for Hubble, they now find themselves in a situation where they might have no optical capabilities at all in space. Hubble is slowing dying from age, and NASA doesn’t have the money to build a new optical space telescope, especially since with any new space telescope proposal the astronomical community has had the annoying habit of demanding more sophistication than NASA can afford.
This announcement however might just save astronomy from becoming blind. Because these spy telescopes are already half built, it will be difficult to add too many bells and whistles. Hire a launch rocket, build the cameras and spectrographs based on the instruments already on Hubble, and get the things in orbit quickly.
The transit of Venus tomorrow.
An overview of the transit of Venus tomorrow.
An overview of the transit of Venus tomorrow.